HARDENED SHAFTS CLUTCH HUBS and DRUMS

300M 4340 4140 STEELS are DEEP HARDENED STEELS with HIGH TORQUE PROPERTIES. 300M IS THE PREMIUM AIRCRAFT QUALITY ALLOY and IS USED ON LARGE JET LANDING GEAR MILITARY and COMMERCIAL. THESE METALS ARE THE STRONGEST AVAILABLE A COMBINATION OF CHROMIUM NICKLE MOLYBDENUM ALLOYS SIMILAR TO 4340, BUT MODIFIED BY THE ADDITION OF VANADIUM AND A HIGHER SILICON CONTENT.